<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>Document</title>
    </head>
    <body></body>
</html>
<script>
    const regx = /ab|12/i;
    console.log(regx.test("abcd")); // true
    console.log(regx.test("12cd")); // true
    console.log(regx.test("DDD12cd")); // true
    console.log(regx.test("DDD16cd")); // false
</script>
